Carbon pack for manifold typewriters



May 23, 1950 L. A. PETfr 2,508,621

CARBON PACK FOR MANIFOLD TYPEWRITERS Filed March 29, 1946 I .dll.

EVE-1722:! launawez 2w without disturbing the interleaves, however.

Patented May 23, 1950 1 UNITED STATES PATENT OFFICE CARBON PACK Fort MANIFOLD TYPEWRITERS Laurence A. Petit, oman. n1,

Application March 29, 1946; Serial No.- 658,058

' 6 Claims. (oi 282 4) This invention relates to improvements in carbon packs for use in machines of the class of manifold typewriters, billing machines and the like. In machines of the character referred to, a plurality of sheets of paper are fed simultaneously, with carbon sheets between them to the platen of the typewriter or billing machine or other such machine, the sheets of paper usually being perforated for tearing off at intervals, each section of each sheet between the perforations usually containing a printed form into which the operator inserts data by means of the typewriter keys. 7

It has been customary heretofore, after a particular form has been filled in, to release the platen roll and by a mechanism provided on the machine to withdraw the sheets of carbon paper until the carbon areas which have just been used are disposed between the next set of forms about to be typed. Y The sheet of paper already typed and thus freed of carbon paper may then be torn off along their perforation lines. The

general appearance of such a manifold type-- writer is shown in my prior Patent No. 2,236,155 granted March 25, 1941, and a carbon pack designed for use in such a machine is shown and claimed in the same patent.

Another form of carbon pack designed for use in such machines is shown in my Patent No. 2,393,409 granted January 22, 1946.

In my prior patents above mentioned, the carbon sheet was wrapped about a holder therefor and to be used it was necessary to unwind the carbon paper from the holder. According to thepresent invention, a long continuous sheet of carbon paper is folded in a zig-zag manner, and between the opposing surfaces which carry the carbon material, I interleave thin sheets of tissue paper in order to prevent sticking of the carbon surfaces or any injury to the carbon treated surfaces of the carbon paper. terleaves each have a free end protruding beyond the folded carbon paper, these free ends being secured to the holder whereby the folds of carbon paper may be drawn successively from between their interleaves for use in the machine, It is apparent therefore that when such a pack is mounted in a manifold machine, the carbon paper as needed may be withdrawn from the pack without removing the pack from its normal position in the machine, and without separating the work sheets.

Accordingly, one of the objects of the invention is to provide a carbon pack for a machine of the general class of manifold typewriters, the pack consisting of a long continuous sheet of carbon paper folded and mounted for gradual withdrawal from the pack without removing the pack from its normal mounting.

The in-' Another object of the invention is to provide a carbon pack of the class described wherein a large supply of carbon paper in the form of [a continuous strip folded in a zig-zag manner may be withdrawn in sections from time to time while the parts not withdrawn are carefully protected from injury. r f Another object ofthe invention is to provide a carbon pack of the class described designedfor ease and economy of manufacture and for max; imum convenience in use. p n Another object of the invention is to provide a carbon pack of the class .described which especially designed to prevent the waste of con-, siderable Y lengths of carbon paper, which has been characteristic of many carbon packs here; tofore used with manifolding machines, Other objects and advantages of the invention inherently possessed by it will be specifically alluded to in the specification or will become apparent from a perusal of the following description.

On the drawings: H

Figure Us a plan view of a carbonpack made in accordance with my invention.

V Figure 2 is a side elevation. of the same pack. A .Figure 3 isa side elevation (exploded) to show thesame pack as it might-appear prior to its assembly into the compact form shown in Fig! ure 2.

Referring now to the drawings, a base or supporting member H), preferably made of heavy paper is provided on which to mount the carbon paper, A single continuous sheet of. carbon paper,.wh0se top fold is indicated as H, is folded in a zig-zag fashion as indicated in Figure 3, there being as many folds and the dimensions of the entire strip and its folds both longitudinally and laterally being subjectto variation'in ac, cordance with the needsof a particular installation in which the carbon pack is used. 1 While Figure 3 shows only a few folds, for the sake of simplicity, it should be understood that inv practice it may be found practical to use up to a dozen or more folds in order to adequate length of carbon paper.

As indicated, in Figures 1 and 3, the upper surface of the 1 fold II "is untreated while its underneath surface I2 carries the carbon deposit. From that observation, it will beunderstood that the .interleaves, preferably of tissue paper and indicated as I3 to 18, inclusive, lie'in contactwith the carbon treated surfaces of. the folded carbonpaper, afew ofsuch surfaces, for examplabeingindicated as I9, 20 and 2|. An additional sheet" 22 maybe placed belbwthe last'fold of the carbon paper. 1

Upon assembly of the packfthe flap 23-of. the backing sheet In isfolded downwardly over the assembly of sheets, and staples 24 unite the flap,

provide an the base sheet and the extremities of the interleaves in the manner indicated in Figure 2. Thus, it will be seen that while the interleaves are securely locked upon the supporting base the folds of the carbon paper are not attached to the base, but are merely held in light frictional engagement between the interleaves. A strip of paper 25 is secured to .and wrapped around the base l0 and around the lateral edges of all of the sheets for the purpose of holding them as a pack in proper alignment.

In using the carbon pack in accordance with this invention a plurality of packs, one for each work sheet which is to receive a carbon copy'in the machine, are mounted upon the machine, one pack between each pair of work sheets'and the individual packs are secured to the carbon shifting carriage in any appropriate manner. For example, they might be secured in stepped relation upon the carbon shifter frame bracket 38 and 21' shown in my prior Patent No. 2,236,155. Preferably, carbon packs made in'accorda-nce with this invention will be mounted in a manifold machine upon carbon pack holders of the character shown in my copending application, Serial No. 658,057 filed March 29, 1946 simultaneously herewith. A pair of apertures 2B-may be provided for attaching the pack to such a holder.

It will be apparent that when-a plurality of these packs are properly mountedin-the manifold machine, the top fold l I atthe top-of each pack may first be drawn out from underneath the wrapper 25 toward the right as Fig. 1 is viewed and toward the platen with its carbon bearing surface facing upwardly and as many more folds of the carbon paper thereafter similarly pulled out as may be required untilenough has been extended to be disposed between the work sheets which are about-to be fed overthe platenof the typewriter. As the folds of the carbon sheet are successively withdrawn from the pack in. a directionaway from the anchored ends of the interleaves, the latter do not interfere with the withdrawal, the folds sliding smoothlyout from between the interleaves. It will be apparent ,that while a portion of each carbon sheet ready forextension over the platen of the typewriter may be used repeatedly, when any section of any sheet has beensufliciently worn out an additional length from the carbon pack may be withdrawn merely by pulling out one or more of the folds which remain'between the interleaves. The interleaves prevent the rubbing of the carbon surfaces in contact with each other, and also prevent such adhesion between them as mightwrinkle the paper or-pull out more carbon paper than is desired.

While I have shown hereina preferred embodiment of my invention, it should be'understood that the same is susceptible of some variation and modification without departure from the invention as defined in the following claims.

. I claim as my invention:

,1. A carbon pack of the class described comprising a base member, a continuous sheet of carbon paper folded thereon in zig-zag manner, interleaves disposed between thecarbon bearing faces of the folds of .said sheet, means securing the interleaves to one end of the .base beyond the adjacent folded edges of said sheet and outside the area of the folds of said sheet,thesheet being thus free for withdrawal of its successive folds from between the interleaves.

2. A carbon pack of the class described comprising a base member, a continuous sheet of carbon paper folded thereon in zig-zag manner, interleaves disposed between opposed ,carbon bearing faces of the folds of said sheet, means securing the interleaves to one end of the base beyond the adjacent folded edges of said sheet .and .outside the area of the folds of said sheet,

the sheet being arranged for withdrawal of its successive ,folds from the other end of said base from between said interleaves.

.3. Acarbon pack .of the class described comprising a base member, a continuous sheet of carbon paper folded in zig-zag manner with all of its folds disposed within the area of said base membeninterleaves disposed between the carbon bearing faces of the folds of said sheet, means securing the interleaves at the rear end of the base beyond the adjacent folded edgesof said sheet and outside the area of the folds of said sheet, the sheet being thus free for withdrawal of its folds from the other end of the basesuceessively from between the interleaves.

4. A carbon pack of the class described comprising a base member, a continuous sheet of carbon paper folded in zig-zag manner with its folds disposed withinrthe areaof said base member but extending longitudinally less than :the length of said base member, interleaves disposed between the carbon bearing faces of the folds of said sheet, means securing the interleaves at the rear end of the base beyond the adjacent folded edges of said'sheet, :the sheet being thus free for withdrawal of its "folds successively from between the interleaves away from the rear end of the base.

5. A carbon pack of .the'class described oomprising a base member, a continuous sheet :of carbon paper folded thereon in .zig-zag manner, interleaves-disposed between the carbon bearing faces of the folds of said sheet, and means .securing the interleaves to the base outside :the area occupied by the folds .of the carbon paper, the carbon sheet .being thus free .for withdrawal of its successive folds ,from between the interleaves. 7

6. A carbon pack of the class described ;com-. prising a base member, a continuous sheet of carbon paper folded transversely of its :length thereon in.zig-zag manner, .interleaves disposed between the carbon bearing faces of the folds of said sheet, meanssecuringthe interleaves ,to the base outside theareaoccupiedby the'foldsof the carbon paper,.and a WIfiPPBIgSeClll'BdgtO thetbase member extendinglaterally overand embracing the assembly of interleaves and .folded carbon paper and the lateral edges thereof, the carbon sheet thus being arranged for withdrawalof its successive folds. in a lengthwise direction from said wrapper and from between the ,interleaves.

"LAURENCE A. PETIT.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 2,233,204 Fleischmann Feb. 25,1941 2,292,343 McAlvin Aug. 4, 1942 2,363,661 Feitl iNovyZii, 1944 2,387,667 Leibfritz Oct. 2-3, 1945 

